mirror of
https://github.com/dashpay/dash.git
synced 2024-12-26 20:42:59 +01:00
92 lines
2.7 KiB
C++
92 lines
2.7 KiB
C++
|
// Copyright (c) 2014 The Bitcoin developers
|
||
|
|
// Distributed under the MIT/X11 software license, see the accompanying
|
||
|
|
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
||
|
|
|
||
|
|
#include "timedata.h"
|
||
|
|
|
||
|
|
#include "netbase.h"
|
||
|
|
#include "sync.h"
|
||
|
|
#include "ui_interface.h"
|
||
|
|
#include "util.h"
|
||
|
|
|
||
|
|
#include <boost/foreach.hpp>
|
||
|
|
|
||
|
|
using namespace std;
|
||
|
|
|
||
|
|
static CCriticalSection cs_nTimeOffset;
|
||
|
|
static int64_t nTimeOffset = 0;
|
||
|
|
|
||
|
|
//
|
||
|
|
// "Never go to sea with two chronometers; take one or three."
|
||
|
|
// Our three time sources are:
|
||
|
|
// - System clock
|
||
|
|
// - Median of other nodes clocks
|
||
|
|
// - The user (asking the user to fix the system clock if the first two disagree)
|
||
|
|
//
|
||
|
|
//
|
||
|
|
int64_t GetTimeOffset()
|
||
|
|
{
|
||
|
|
LOCK(cs_nTimeOffset);
|
||
|
|
return nTimeOffset;
|
||
|
|
}
|
||
|
|
|
||
|
|
int64_t GetAdjustedTime()
|
||
|
|
{
|
||
|
|
return GetTime() + GetTimeOffset();
|
||
|
|
}
|
||
|
|
|
||
|
|
void AddTimeData(const CNetAddr& ip, int64_t nTime)
|
||
|
|
{
|
||
|
|
int64_t nOffsetSample = nTime - GetTime();
|
||
|
|
|
||
|
|
LOCK(cs_nTimeOffset);
|
||
|
|
// Ignore duplicates
|
||
|
|
static set<CNetAddr> setKnown;
|
||
|
|
if (!setKnown.insert(ip).second)
|
||
|
|
return;
|
||
|
|
|
||
|
|
// Add data
|
||
|
|
static CMedianFilter<int64_t> vTimeOffsets(200,0);
|
||
|
|
vTimeOffsets.input(nOffsetSample);
|
||
|
|
LogPrintf("Added time data, samples %d, offset %+d (%+d minutes)\n", vTimeOffsets.size(), nOffsetSample, nOffsetSample/60);
|
||
|
|
if (vTimeOffsets.size() >= 5 && vTimeOffsets.size() % 2 == 1)
|
||
|
|
{
|
||
|
|
int64_t nMedian = vTimeOffsets.median();
|
||
|
|
std::vector<int64_t> vSorted = vTimeOffsets.sorted();
|
||
|
|
// Only let other nodes change our time by so much
|
||
|
|
if (abs64(nMedian) < 70 * 60)
|
||
|
|
{
|
||
|
|
nTimeOffset = nMedian;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
nTimeOffset = 0;
|
||
|
|
|
||
|
|
static bool fDone;
|
||
|
|
if (!fDone)
|
||
|
|
{
|
||
|
|
// If nobody has a time different than ours but within 5 minutes of ours, give a warning
|
||
|
|
bool fMatch = false;
|
||
|
|
BOOST_FOREACH(int64_t nOffset, vSorted)
|
||
|
|
if (nOffset != 0 && abs64(nOffset) < 5 * 60)
|
||
|
|
fMatch = true;
|
||
|
|
|
||
|
|
if (!fMatch)
|
||
|
|
{
|
||
|
|
fDone = true;
|
||
|
|
string strMessage = _("Warning: Please check that your computer's date and time are correct! If your clock is wrong Bitcoin will not work properly.");
|
||
|
|
strMiscWarning = strMessage;
|
||
|
|
LogPrintf("*** %s\n", strMessage);
|
||
|
|
uiInterface.ThreadSafeMessageBox(strMessage, "", CClientUIInterface::MSG_WARNING);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (fDebug) {
|
||
|
|
BOOST_FOREACH(int64_t n, vSorted)
|
||
|
|
LogPrintf("%+d ", n);
|
||
|
|
LogPrintf("| ");
|
||
|
|
}
|
||
|
|
LogPrintf("nTimeOffset = %+d (%+d minutes)\n", nTimeOffset, nTimeOffset/60);
|
||
|
|
}
|
||
|
|
}
|